Function
- Enter the loads required to analyze a grillage model. Load cases are automatically generated in an auto-generated model.
Call
From the main menu, select [Structure] tab > [PSC Bridge] group > [PSC Box Bridge] > [Grillage Model]
Input
Grillage Model Load dialog box
Self Weight
Self weight of the model.
Pavement
Weight of pavement. This load is calculated based on the thickness and unit weight of pavement and distributed to the longitudinal members by the Beam Element Loads. The eccentricity between the centroids of load and section is automatically considered.
Barrier
Barrier load.
Median Strip
Weight of median strip. When the median strip loads happen to fall between two longitudinal girders, the loads are distributed into those two girders in proportion to the distance from the load to the girder.
Live Load
Vehicular load. The traffic lanes are auto-generated using Grillage Model Wizard. Vehicles and moving load cases need to be defined separately after performing Grillage Model Wizard. Impact factor is automatically considered in case AASHTO Standard is selected for the Moving Load Code.
No. of Lanes
Number of traffic lanes.
D1, D2, D3...
Distance from the left-hand end of the top slab to the center line of each lane when you see it from the start point of a bridge to the end point.
Settlement
When Settlement is entered, the settlements by the locations of the auto-generated support settlement group are automatically analyzed.
Temperature
Temperature load.
Temperature Gradient
Temperature difference between the top and bottom surfaces of the girder.
Wind Load
If you want to consider the load distribution per girder, taking into account the wind load that acts on only one side of the bridge, please re-enter using the general function.
W
Horizontally distributed load to be applied to the centroid of longitudinal member.
T
Distributed moment load to be applied to the centroid of longitudinal member.